No. Abandoning WoD was genuinely inexcusable for Blizzard and still a huge blemish on WoW's history to this day. I don't think totally fucking something up twice is acceptable.
The game is fundamentally broken, yes, but it's within their power to fix. Many random players on forums have come up with great ideas, if Blizzard chooses to be too proud to adjust then I think it says a lot for the future of the game. This whole "We don't want to change designs too much mid-expansion" is inexcusable when they're able to create something this fundamentally broken.